public class VariavleTest {
    public static void main(String[] args) {
        int number1;
        number1 = 10;

        int number2;
        number2 = 20;

        int number3;
        number3 = number1 + number2;
        System.out.println("number3 = " + number3);

        int number4 = 50;
        int number5 = number4 - number3;
        System.out.println("number5 = " + number5);
    }
}
